Difference between revisions of "ONCLOSE Table Constraint"
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==Purpose== | ==Purpose== | ||
Table constraint activated when the table is closed | Table constraint activated when the table is closed | ||
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==Syntax== | ==Syntax== | ||
ONCLOSE <procedure> | ONCLOSE <procedure> | ||
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==See Also== | ==See Also== | ||
[[ALTER TABLE]], [[SQL Constraints|CONSTRAINTS]], [[CREATE TABLE]] | [[ALTER TABLE]], [[SQL Constraints|CONSTRAINTS]], [[CREATE TABLE]] | ||
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==Description== | ==Description== | ||
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The ONCLOSE table constraint is activated when the table is closed. The <procedure> specified must be a character expression evaluating to a procedure name. If no file extension is included, '.prg' is assumed. The specified procedure is run before the operation to close the table is executed. | The ONCLOSE table constraint is activated when the table is closed. The <procedure> specified must be a character expression evaluating to a procedure name. If no file extension is included, '.prg' is assumed. The specified procedure is run before the operation to close the table is executed. | ||
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==Example== | ==Example== | ||
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[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:SQL]] | [[Category:SQL]] | ||
Latest revision as of 08:12, 7 December 2012
Contents
Purpose
Table constraint activated when the table is closed
Syntax
ONCLOSE <procedure>
See Also
ALTER TABLE, CONSTRAINTS, CREATE TABLE
Description
A constraint is used to define rules that help to provide data integrity. TABLE constraints apply to table-based operations. You must have ALTER privilege on the table. The table will be locked for EXCLUSIVE use during the operation.
The ONCLOSE table constraint is activated when the table is closed. The <procedure> specified must be a character expression evaluating to a procedure name. If no file extension is included, '.prg' is assumed. The specified procedure is run before the operation to close the table is executed.
Example
ALTER TABLE customer; modify ONCLOSE "p_close"
